.contaienr{
	/* backface-visibility属性用于测试postcss-loader兼容浏览器，打包后添加webkit-等前缀 */
	backface-visibility: hidden;
	.title {
		color: red;
	}
	.box{
		width: 200px;
		height: 200px;
	}
	.box1{
		background: url(../img/angular.png);
	}
	.box2{
		background: url(../img/react.png);
	}
	.box3{
		background: url(../img/vue.png);
	}
}